Pirog I guess. Francisco Bojado has to be in there, just not being able to handle the pressure of the spotlights.
Out of these three it's definitely not Pirog, because he wasn't able to continue his boxing career due to serious health issues (a herniated disc). Ike Ibeabuchi was imprisoned for rap*, as far as I remember. Those cases sometimes are tricky (like Mike Tyson's, e.g.)... But if he was guilty indeed, maybe it's his career that is the most wasted in boxing. Because he could have dominated the heavyweight division.
valero had something very wrong with him and he should never have been allowed to box in the first place. there are stories of him being sent home from pretty much every sparing camp he went to, because he refused to listen and do what he was being paid for. he just went out headhunting to make a name for himself and got dragged out and sent packing after a minute or so. that in itself isnt so bad, but he regularly beat the hell out of his wife and allegedly other women also. i believe he was even sectioned for a few months at one point because his behaviour was deemed so odd and aggressive by the police and doctors who treated his wife for her constant 'clumsiness'. yet he was continually granted licenses to box. he had serious and well known physiological/neurological problems that getting punched in the head for a living most likely exacerbated leading to him then murdering his whole family. i understand people considering his career wasted in some respects, but its like saying that if he wasnt an unbelievably violent psychopath who couldnt follow simple instructions or even behave normally he might have been a better boxer; instead of a dead murderer.
Juan "El Pollo" Valenzuela He was mismanaged early in his career and took fights on short notice without being in shape. His eye was damaged for taking a fight on short notice and was out of shape, which is what put him on medical suspension and can no longer get licensed. But at his best, when his on top shape, he's almost unstoppable and had great ko power.